Don they need a big yard and a lot of exercise?
The minimum requirement for exercise is a 15 minute walk, every other day, ideally daily. They have about the same exercise requirements as other dogs. They sleep about 20 hours a day. We call them “45 MPH Couch Potatoes” for a reason. Greyhounds MUST be kept on a leash in any unfenced or partially fenced areas, and cannot be turned loose to run at open parks, or on hiking trails in the foothills. They have no street smarts, and are sighthounds… will take off after something they want to catch and will be more than a mile away within two minutes. Even if you take them through obedience training, never trust them to return when off leash.
